Press shortbread dough into a square baking pan.Bake for 10 - 12 minutes until slightly golden on edges.As soon as shortbread comes out of the oven, sprinkle an even layer of chocolate chips on top.The chips will melt quickly so you can spread over the shortbread.Sprinkle with Crushed Peppermint CandyWhen chocolate has hardened, break bark into chunks, or cut into desired shapes.